The Q-cable is comparable to the Black Widow cable.
The Q is a nice sounding cable, I currently have it on my LCD-X. Certainly the highs are a bit more extended with the SW22, and the bass is better textured. I hear more of a difference with the SW22 on my LCD2.2's than on the X's.
I think the X's are more suited to the Q, as the highs are already more extended on this phone, and the addition of a little warmth is welcome.
But I'm really enjoying the sound of the SW22 + LCD2.2. I had been listening to it most of the evening